Pillow for bathtub



FIG. 1 is a top, front, right side perspective view of a pillow for bathtub showing our new design;

FIG. 2 is a top, front, left side perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a left side view thereof, the right side view being a mirror image;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof. 

CLAIM The ornamental design for a pillow for bathtub, as shown and described. 